Boiler



Dec. 22, 1931.

v. D. CON KLIN 7 1,83 7,534

BOILER Filed April 14. 1930 I N VEN TOR.

We I? 3. C a'mflzkz.

A TTORNEY.

Patented Dec. 22, 1931 VERIJE DVGONKLIN, OF ST, JOSEPH, MICHIGAN,

assrenoa TO 'GOMBINATIONI'BOTLER 00., OF BEN'I'0N HAEBOR,IYIICIHGAN, A CORPORATION OF FLEIIGHJ IGAN f:

BOILER Application filed April 14,

The invention relates to boilers, and particularly to boilers of the combination fire box and horizontal return tube type, and has for its object to provide a device of this character having a pair of furnaces and adjustable is disposed in an outer boiler shell its ends spaced from the ends of the outer shell to provide vertical extensions of thefirebox at each end and within the boiler shell per se, and in which vertical extension adustable, baffie plates are disposed whereby said bafiie plates may be arranged in combination with the inner and outer shells to form smoke boxes within the outer shell per se, thus eliminating the necessity of providing auxiliary smoke boxes.

Afurther object is to provide a device of this character in which the fire tubes and smoke boxes, are so disposed in the boiler, that, with the use of shiftable baffle members to form the bottom of the smoke boxes, the smoke boxes may be cleaned by shifting the bafiie' members to dump the soot deposited thereon in use without the necessity of opening the smoke box to remove the soot by hand.

With the above and other, objects in view, the invention resides in the combination and arrangementof parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention. 7

In the drawings:

Figure 1 is a longitudinal vertical sectional view of the boiler taken on line 1-1 of Figure 2.

Figure 2 is a front view 'ofthe boiler show- 1930. .Serial 110.444,]50.

ing a part thereof in transverse verticalzse cgtion on line 22 of Figure 1. Figure 31s a rear view of. he boiler showf ing a part thereof in transverse verticallseco v I I longitudinal sectional view of the boiler illustrating the tion on line 33 of Figure 1. H

Figure 4 is a fragmentary.

use of an oil burner therewith.

Referring to the drawings, which trate the preferred embodiment of the'. .,in-" vent-ion, the numeral 1 designates van outer boiler, shell .comprisedof a Wrapper 25 and front and rear head sheets 26 and 27 respec-.

tively, W-hichmay beof any desired-size and I 4 shape. The outer shell .1 is providedfwith the customary smoke outlet 3,fire door 4:, ash door 5, rear access opening '6 andfl and a door 8 giving access tothe inside of the boiler.

At thebottom of the outer shell issnitably disposed agrate 9 of any conventional form which preferably extends from the front thereof to a point intermediatethereof at which a suitable transverse bridge wall 1 0 is disposed. Anauxiliarygrate.(notshow-n) ora refractory lining llsuitable for use with anoil burner 12,1as shown in Fig. 4, may be disposed between the bridge wall 10 and the rear of the outer shell. Obviously where two grates or furnaces are employed, such as "9 and 11, they communicatewith each other above the transverse bridge Wall 10. y i

WVithin the outer shell 1 is disposed an inner boiler shell ltcomprised of front'and rear tubesheets 16 and resale fire box crown having side sheets 13 andfront and rear door sheets 29 and-30.. The inner boiler shell in combination with the outer boiler shell forms the boiler waterchambers which extend therebetween, said water chambersin- 1 head sheet 29 and between rear tube sheet 28 and rear head sheet 30. J ournaled in the inner and outer shells adjacent the front and rear ends thereof and adapted to rotate about their respective axes are a plurality of bafile plates 18, 19, 20 and 21, respectively, which are preferably formed of suitable heat resisting or refractory material; These plates are of a width equal to the spacing of the tube sheets and head sheets of the innerand outer shells between which they are mounted, and

when disposed in horizontal position they form closures for the vertical extensions of the fire box hereinbefore described. Suite able locking means (not shown) are provided to hold the baffle plates in desired position, and studs 22 extending from the bafile plates project from the outer shell at one side there.

of. 'A suitable crank 23 fitting said studs is adapted tobe employed to rotate said bafile plates from the outside of the boiler as desired without the necessity of working within the boiler to change the position of the baffles as is necessary in boilersof conventional construction. Spacer members 24 encircle the rear of the boiler, thence upwardly past baflle 21;thence into andforwardly through the lower set of fire tubes under the direction of bafiie 20, thence upwardly under the direction of closed balfie' 19, thence past baffle 18 into and rearwardly through the upper set of fire tubes, and thence from said'upper set of fire tubes to and through the smoke outlet 13; the afore-described path of travel being clearly illustrated by the arrows inFigure 1.

When the other furnace 11 is used, as with the burner 12 whoseproducts of combustion require a long restricted path of travel,

the bafile 21 may be closed, baffle 19 opened,

baffle 18 closed, and baffle 20 closed; and the products of combustion will then be directed from furnace 11 to the front of the boiler,

thence upwardly past baffle 19, thence into andrearwardly through the lower tubes under the direct-ion of baffle 18, thence upwardly .into and forwardly through the intermediate tubes below bafile 20 and above baffle 18,

c that the last described path of thence upwardly into and rearwardly through'the upper tubes, and thence out through the smoke outlet 13. It willjbe'seen 7 travel directs the products of combustion four times the length of the boiler to and through the fire tubes, while the first described path of travel directs themto and through the tubes but three times the length of the boiler. Ob-

ing the number viously more than two bafiles may be disposed at each-end of the boiler if desired, and by an increased number of baffles a longer path of travel may be had. Both paths of to the smoke outlet by varying the crosssectional area of the path oftravel icy-changof tubes in each portion of said path. V i It will be observed that the spacing of the tube sheets and head sheets of the inner shell produces several distinct and great advantages as compared with conventional boilers of this type, by virtue of the fact that this construction permits smoke boxes to be formed within the outer boiler shell per se, with the adjacent sections of the inner shell forming the walls of thesmoke boxes and the horizontally disposed baflle plates forming the bottoms of the smoke boxes. c It is customary in this type of boiler to make the smoke boxes auxiliary to the outer'boiler shell because the inner boiler shell conventionally extends substantially the length of the outer shell, but the instant construction eliminates the necessity of such a construction. Material advantages are obtained by this spaced construction, chief among which are the prociency of the boiler by preventing the loss of heat through the smoke boxes; the compact integral construction of all the elements of the boiler within the outer shell per se; and the ease with which the smoke boxes of this construction may be cleaned, it being necessary only to rotate the horizontal bafifles forming the bottoms of the smoke boxes to dump the soot carried thereby into the grates to be reburned or discharged, where as it is necessary with the conventional, construction of boiler smoke boxes to provide doors opening into the smoke boxes through which access to the smoke boxes may be had to shovel or otherwise remove the soot by hand with the attendant disagreeable dirt and trouble. Also with this construction in which are provided vertical extensions of the fire box at each end thereof with which adjustable baffle ing much more flexible .than conventional boilers of this type.

By the use of the double furnace constru tion many advantages and possible combinations may be obtained. Thus the furnaces nae-7534 may be arranged with a grate and a gas or oil burner to permit the use of gas or oil as the heating fuel and to provide for means with which coal or other solid fuel may be employed for auxiliary heating purposes; or to permit the grate to be used as a garbage incinerator. Another combination which might be used is the combination of two grates, one for heating purposes and the other as a garbage incinerator.

Thus this construction has the advantages of being easily adaptable for many different uses at small expense; of having bafiles easily adjustable from the exterior of the boiler and adapted to direct the products of combustion in any desired path of travel through the boiler, and of having smoke boxes integrally formed within the boiler shell per se and arranged to be easily cleaned from the exterior of the boiler without the necessity of opening and reaching into the same. i

The invention having been set forth, what is claimed as new and useful is:

1. In a boiler of the combination fire box and return tube type, the combination of an outer boiler shell having a, smoke outlet and a double furnace forming a fire box, an inner shell disposed in said outer shell, the front and rear ends of said inner shell being spaced from the ends of the outer shell, to form water legs, tube sheets carried by said inner shell in spaced relation to the ends of said inner shell, the space between saidtube sheets and the ends of said inner shell forming vertical extensions of the fire box, a plurality of open ended hori- Zontal tubes carried by said tube sheets and a plurality of spaced baffle plates rotatably mounted in the vertical extension of the fire box, said baffie plates being adjustable to direct the products of combustion in predetermined paths of travel through the fire tubes from the furnace in use to the smoke outlet.

2. In a boiler of the combination fire box and return tube type, the combination of an outer boiler shell having a smokeoutlet and a fire box, an inner shell disposed in said outer shell, means carried by said inner shell and cooperating with the ends of said outer shell to form end water legs in spaced relation to the ends of said inner shell, a plurality of horizontal fire tubes passing longitudinally through said inner shell, and a plurality of spaced bafiie plates adjustably mounted between the ends of said inner shell and said end water legs.

box,anda adjustable means for directingthe 7 products of combustion: through saidffire tubes; in predetermined paths of travel fro the firebox to the smoke outlet. I

- 4. Ina boiler, the combinationof an outer ably mounted between said tube sheets and r the ends of said inner shell to adjustably direct the path of travel of the'products-of com.- bustion through saidtubes;

v 5. In a. boiler, thexcombination of an outer boiler shell having a smokeoutlet and a fire box,.an .inner shell'disposedin said o-uter'shell having end plates spaced: from the ends of said outer' shell. and tube sheets spaced from said end plates, the spacesbetween said: end plates and tubexsheets forming vertical" extensions of the fire box, a plurality of fire tubes carried by said tube sheets passing through said inner shell and communicating with thevertical extensions of said firebox,

and adjustable bafiie plates disposed in the vertical. extensions of said fire box to direct the path of travel of theproducts of combustion through said firetubesr A 6. Ina water jacketed boiler, the combination of an outer boiler-shell having asmoke outletand a fire box, an inner shell disposed in said outers'hell, a plurality of fire tubes passing through said lnner shell and communicatinggwith said fire box with said outer shell, and adjustable means for directing the products of combustion through said fire tubes in variable predetermined paths of travel of variable cross sectional area.

7. In a boiler of the combined fire box andreturn tube type, the combination of an outer boiler shell having a smoke outlet and a fire box, said fire box comprising spaced furnaces, an inner shell mounted in said outer shell with its ends spaced from the ends of said outer shell to form water legs, a plurality of fire tubes passing longitudinally I 7 through said inner shell and communicating with said fire box, and a plurality of spaced bafiie plates rotatably mounted adjacent the ends of said fire tubes andadapted to be positioned to direct the products of combustion of either furnace in a predetermined path of travel through said fire tubes to saidsmoke outlet.

8. In a boiler return tube type, the combination of an outer boiler shell having a smoke outlet and a fire box, spaced furnaces communicating with said fire box, an mner shell mounted in said casing with its ends spaced from the ends of the outer shellto form water legs, a plurality of fire tubes passingllongitudinally ofthe combined fire b oxand through said inner shell and communicating with said fire box, and a vplurality of spaced adjustable baflie plates, mounted adjacent the ends of said fire tubes, said bafiles' being 5 adapted to be positioned with respect to said shells to form smoke boxes within the boiler. 9. In a boiler of the combined fire box and return tube type, the combination of an outer boiler shell havinga smoke outlet and a fire box, spaced furnaces communicating with said fire box, an'inner shell mounted in said outer shell with its ends spaced from the ends of said'outer shell to form water legs, tube sheets carried bysaid inner shell in spaced relation to the ends ofsaid inner shell, a plurality of fire tubes carried bysaid tube sheets passing through said inner shell and communicating with said fire box, and means for adj ustably directing the path of travel of the products of combustion from said firebox through said fire tubes to accommodate the use of either furnace. i 10. In a boiler of the combination fire box and return tube type, the combination with as a Water acketed boiler shell having a smoke outlet and a'fire box, said fire box comprising a double furnace, of a plurality of open ended fire tubes disposed in said shell with their ends spaced from the end walls of said shell 3:) to provide vertical extensions ofthe fire box between said shell and tubes at each end of the shell, and adjustable baflies interposed between said shell and tubes to direct the products of combustion from said fire box to 53;; said smoke outlets in predetermined paths of travel. r i V In testimony whereof I aflix my signature. VERLE D. CONKLIN. 

